I am studying ABX3 perovskites, and I would like to calculate Goldschmidt tolerance factors for them. The A sites in these materials have a coordination number = 12.
The Shennon's paper (R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta. Cryst. A 32, 751 (1976)) provides values for ionic radii for the coordination number = 12 only for a few elements but doesn't do it for most other elements.
Are there any sources, where I can get ionic radii for CN=12 for all elements?